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Can't afford your own karaoke-singing robot girlfriend? Griffin's next trick is iKaraoke, a little device that sends your iPod's music to your stereo via either a line-in cable or the FM band, and somehow removes vocals and adds yours to the mix. The microphone has controls that let you pause the music, scan backward and forward and add reverb effects, and you can push a button on-the-fly and bring the music's vocals back into the mix.

Sure, karaoke is a worn-out fad, but still, there's no thrill quite like sitting next to a mild-mannered coworker who suddenly stands up and shows everyone that she can sing exactly like Aretha Franklin. This $50 device might just democratize the process, which could be good or bad. Coming next month.